Bar-cutting machine.



P. M. HAAS & F.' M. NAIR.

' BAR CUTTING M ACHINE.

APPLlCATlON FlLE D OCT. 1, 191].

Patented July 23, 1918.

3 SHEETSSHEET 1- W Afro/Wm? P. M.HAAS & F. M. NAIRJ BAR CUTTING MACHINE.

'APPLICATION FILED OCT. 1. I911- a "km. M

P. M. HAAS & F. M. NAIR.

BAR CUTTING MACHINE.

XAPPLICATION FILED 001.1. 1911.

3 SHEETS-SHEET a.

7 WI! 3 6 II mar/var; aMXr/WD. DZai/l/ $5 M. Wrm mn Patented July 23, 1918.

UNITED sT TEs PATENT OFFICE.

PHILIP 1n. HAAS, or YOUNGSTOWN, oHIo, AND FR NK M. NAIR,

. PENNSYLVANIA.

OF BEAVER FALLS,

BAR-CUTTING MACHINE.

Specification of Letters Patent. Patented J uly 23, 1918. I

Application filed October 1, 1917. Serial No. 194,123.

To all whom it may concern:

Be it known that we, PHILIP M. HAAs and FRANK M. NAIR, citizens of the United States, residing, respectively, at Youngstown, in the county of Mahoning and State of Ohio, and at Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improve-' ments in Bar-Cutting Machines, of which the following is a specification.

The invention relates to a machine for transversely cutting a bar for dividing it into sections of desired lengths; and the object of the invention is to provide a rotary head for clamping and rotating the bar for cutting, with means for releasing the bar for feeding it endwise through the head.

A preferred embodiment of the invention is illustrated in the accompanying drawings forming part hereof, in which Figure 1 is a side elevation of the bar cutting machine, showing the rotary head and clamping means in section, on line AA, Fig. 3;

Fig. 2, a side elevation of the'clamp operating means, showing the rotary head in section, on line A-A, Fig. 3;

Fig. 3, a plan view of the clamp operating means showing the rotary head in sec tion, on hne BB, Figs. 1 and 2;

Fig. 4, an end elevation of the rotary 7 head;

Fig. 5, a detached perspective view of one jaw; and

Fig. 6, a detached perspective view of one jaw bushing' Similar numerals refer to similar parts throughout the drawings.

Upon the base 1 of the machine are mount ed suitable journal bearings 2 and 2*, for the hollow shaft or cylindric sleeve 3, on one end of which sleeve is secured a suitable gear wheel 4 by means of which the cylindric sleeve may be rotated in the journal bearings. e

The other end, herein referred to asthe forward end, of the cylindric sleeve is enlarged in diameter and is provided with the counter-bore 5 in which is located the idle sleeve .6, which is'freely rotatable in the counter-bore and has an inside diameter substantially equal to that of the cylindric sleeve, forming a clear through. passage for receiving abar for cutting. V

Thesame end of the cylindric sleeve is provided .with the larger counter-bore 7 in which is located the pair of semi-cylindric.- jaws 8, which jaws are provided with the internal annular L-flanges 9 on. their rear, ends interengaging with the external L- flanges 10' on the forward end of the idle sleeve 6, thus forming a swivel connection between these parts.

The external'annular groove 11 is provided at therear end of the idle'sleeve 6,

in which are freely engaged the short arms 12 of the bell cranks. 13 which are, jour- 'naled on the shafts 14 mounted in the cars 15 provided on diametrically opposite sides of the cylindric sleeve 3, which sleeve is provided with the slots 16 located between said ears to receive the hubs and shorter.v arms of the bell cranks 13.. I r

The longer arms 17 of the bell cranks extend alongside the cylindric sleeve at a free interval therefrom, and their, free ends are. connected bytheir pivots 18 with theinner, ends of the outwardly extending links 19, and the outer ends of these links are in turn connected by the pivots 20 with the outer ends of the radial ar1ns 21 which are formed or secured on the collar 22 which is swiveled or journaled, on the cylindric sleeve 3, and is ed on the base 1 of the machine; on one end ofwhich rock shaft is likewise keyedthe operating lever 30 by means of which the idle sleeve 6 and the clampjaws 8 swiveled thereon may bemoved longitudinally in the I counter-bore of the cylindric-sleeve 3.

Each semi-cylindric jaw 8, is slightly tapered externally from a larger diameter at its rear end 8? to its forward end 8 and -at the middle of the side. of the forward end of each j aw is provided the square block31,

having a flat face v32 beveled or inclined outward from front to rear; and uponthe edge sides at the same end of each semicylindricjaw are provided the square blocks 33, hav ing their faces 34 formed parallel with the aXis of the jaw and also parallel withthe sides of the beveled blocks 31,

Upon the forward end of the cylindric sleeve 3 is secured the cap or head 35, as by screwing the flange 36 upon the end 37 of the sleeve; by means of which screw connection the head may be adjusted endwise on the sleeve, and the head be fixed in any position of adjustment by means of the lock nut 38, which is in the form of a collar screwed upon the end of the sleeve inside the screw flange 36 of the head.

The head is provided with a suitable annular opening 39 for receiving the forward ends of the jaws when the same are spaced slightly apart as shown in Fig. 4; and in the sides of this opening are cut the longitudinal channels 40 and 41 for receiving the blocks 31 and 3.3 on the jaws. The bottoms 42 of the channels 40, are formed flat and are beveled or inclined in correspondence with the beveled fiat faces of the blocks 31, and the bottoms 43 of the channels 41 are formed in a plane parallel with the axis of the head, which blocks and channels cooperate to stop the jaws from rotating with respect to the head, while permitting them to slide endwise therein.

The forward ends 8 of the jaws 8, are normally held slightly spaced apart, by means of the coil springs 44 located in the recesses 45 provided at the sides ofthe jaws adjacent to the forward end thereof, and it is evident that by an endwise forward movement of the jaws in the head, the jaws will be forced together by reason of the wedge action of the beveled flat faces 32 of the blocks 31 operating against the reversely beveled flat abutments formed by the bottoms 42 of the recesses 40 in-the head; and that an endwise rearward movement of the aws will permit the action of the springs 44 to force the forward ends of the aws apart, as shown in Figs. 2 and 4.

Suitable semicircular bushings 46 are detachably located in the forward ends of the jaws, and the inner faces 47 of these bushings are suitably formed and shaped for engaging the particular bar to be out. The

bushings are held against endwise movement in the jaws, by means of the annular ribs 48 engaging with corresponding grooves 49 provided therefor in the'jaws; and the bushings are furthermore secured to the jaws by means of the cap screws 50, which may be entered through suitable apertures 51 provided in the cap or head of the machine.

In the operation of the machine, bushings for engaging the bar are secured in the jaws and the bar to be cut is entered from the rear, endwise through the hollow shaft or cylindric sleeve 3, until its forward end protrudes through and beyond the clamping jaws; and a. suitable stop 52 is preferably mounted upon the base 1 of the machine, against which the forward end of the bar may abut for making a cut of the desired length by means of a cutting tool 53 likewise mounted upon the base of the machine.

When the first bar of a given size or diameter is placed in the machine, the cap or head thereof is adjusted by screwing upon the end of the cylindric sleeve, until the jaw bushings are clamped upon the bar, after which the head is given a slight turn in the reverse direction for releasing the bar and is then locked in position by means of the nut 38; this adj ustment being made when the operating lever is rotated to the left or rearward as shown in Fig. 2 which draws the jaws into their rearmost or releasing position shown in the same figure. In this position, the bar is free to move'between the jaws, or in other words, the jaws are free to rotate without turning the bar,which permits the bar to be inserted in the machine without stopping the rotation ofthe cylindric sleeve and'clamping jaws therein.

When it is desired to make a cut, the bar having been pushed into proper position with its forward end against the stop 53, the

operating lever 30 is pulled to the right or.

forward, which carries the slide collar ,uu and the links 19 forward and swings the free ends of the long arms 17 of the bell cranks l3 inward and the short arms 11 thereof forward, thus sliding the idle sleeve 6 and the jaws 8 forward and clamping the jaw bushings upon the bar by action of the wedge blocks 31 in the inclined channels 40 of the head; it being understood that in this position, the outer ends of the links 19 are carried forward beyond the inner ends thereof, thus locking the 'mechanism in clamped position.

Upon the completion of the cut, the operating lever is swung to the left or rearward, thereby releasing the jaws from the bar which may then be pushed forward again in position for another out without stopping the operation of the machine; it being under stood that either the swivel connection between the jaws 8 and the idle sleeve'6 or the and the arms 5 of the bell crank, serves to permit the continuous rotation of the jaws with reference to the operating means by which the jaws are moved forward and rearward for clamping or releasing the bar, (it being immaterial as to which of these swiveled joints is brought into play), so that the idle sleeve may either rotate with the jaws or not, without affecting the operation of the machine.

The cylindric jaws 8 and the adjoining and adjacent parts are so shaped and proportioned that the rear endslare free to separate with the forward ends, asshown in Fig. 2, and it is evident that the full extent of the beveled flat faces 32 on the jaws will be acted upon by the abutting beveled flat bottoms 42 of the head recesses, throughout the whole extent thereof, thus clamping the full length of the jaw bushing 46 against the bar and holding the same more rigid than would be possible if the jaws did not operate bodily to and from each other throughout their length.

W e claim 1. A bar cutting machine having a rotary sleeve, semi-cylindric jaws in the end of the sleeve having square blocks with beveled flat faces on the sides of their forward ends, springs for normally separating the same ends of the jaws, a head on the forward end of the sleeve having an opening for the jaws and channels with beveled flat bottoms for the beveled blocks, and means for sliding the jaws endwise in the head for clamping together their forward ends by the wedge action of the beveled blocks.

A bar cutting machine having a rotary sleeve, semi-cylindric jaws in the end of the sleeve having square blocks with beveled flat faces on the sides of their forward ends, springs for normally separating the same ends of the jaws, an adjH stable head on the forward end of the sleeve having an opening for the jaws and channels with beveled fiat bottoms for the beveled blocks, means for locking the head in a given position, and means for sliding the jaws endwise in the head for clamping together their forward ends by the wedge action of the beveled blocks. 7

3. A bar cutting machine having a rotary sleeve, semi-cylindric jaws in the end of the sleeve having square blocks with beveled flat faces on the sides of their forward ends, springs for normally separating the same ends of the jaws, a head on the forward end of the sleeve having an opening for the jaws, and channels with beveled fiatbottoms for the beveled blocks, and means for sliding the jaws endwise in the head for clamping together their forward ends by the wedge action of the beveled Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

blocks, said means including lever and link connections automatically locking the jaws in clamped position.

4. A bar cutting machine having a rotary sleeve with an idle sleeve rotatable therein, semi-cylindric jaws swiveled on the end of the idle sleeve and having square blocks with beveled fiat faces on the sides of their forward ends, springs for normally separating the same ends of the jaws, a head on the forward end of the rotatable sleeve having an opening for the jaws and channels with beveled fiat bottoms for the beveled blocks, and means for sliding the idle sleeve endwise for clamping together their forward ends by the wedge action of the beveled blocks.

5. A bar cutting machine having a rotary sleeve, semi-cylindric jaws in the end of the sleeve, adapted to be bodily separated throughout their length therein and having square blocks with beveled fiat faces on,

their sides, a head on the forward end of the sleeve having an opening for the jaws and channels with beveled fiat bottoms for blocks with beveled fiat faces on their sides,

a head on the forward end of the sleeve having an opening for the jaws and beveled fiat abutments for the beveled blocks, means for stopping the rotation-of the jaws with PHILIP M. HAAS. FRANK M. NAIR.

Washington, D. G. 

